Energy Transformation Field its from MoF its a bit of a spell soaker every level of spell cast in it is added to the trigger spell and doesn't go off...so if you had fireball as the trigger spell it would go off every time 3 levels of spells was cast in the area and set it off...sorry if this post is a bit all over drunk way to much and trying to help people is not something I'm good at...lol sorry guys some one else will do a better job of helping you I'm sure.